Post a reply

Avatar for knarge
May 8, 2020 8:23 AM CST
Philadelphia, Pennsylvania
My tomato seedlings were started in late February in a germination kit with a grow light. About a little over a month ago, I transplanted them, but unfortunately most of my plants have a problem: there is a narrowed/contracted, hard woody area on the stem about 1-2cm above the soil line. They also had a few leaves just pop off in the week or two after transplantation. Are my seedlings going to survive? This issue seems to share characteristics of damping off, though the plants are a bit older and otherwise appear relatively healthy, other than some mild purpling on the underside of the leaves (perhaps a consequence of overwatering?).

The problem is consistent across 3 different varieties of tomato plant, yet my pepper and tomatillo varieties are all fine.

Advice greatly appreciated.
Thumb of 2020-05-08/knarge/0cc133
Thumb of 2020-05-08/knarge/929744
Thumb of 2020-05-08/knarge/30da9d
Last edited by knarge May 8, 2020 9:07 AM Icon for preview
Image
May 8, 2020 8:39 AM CST
Name: Big Bill
Livonia Michigan (Zone 6a)
GROW ORCHIDS!!!
Bee Lover Lover of wildlife (Raccoon badge) Orchids Region: Michigan Hostas Growing under artificial light
Echinacea Critters Allowed Cat Lover Butterflies Birds Region: United States of America
When you plant them outside, just plant them deeper and get that brown band of tissue on the stem in the ground. They do fine planted deeper. They will produce a deeper root system.
The purple coloring is from anthocyanin pigments that are ultimately responsible for the red in a red tomato! In more light as the seedlings develop, that pigment becomes a bit more intense. It does not come from over watering.
Damping off I am pretty sure comes from when the seed first germinates and emerges through the soil layer.
Tomatoes drop
Older leaves occasionally and like to grow moist but not soggy! If they dry out too much and for too long, leaf loss could occur.
Orchid lecturer, teacher and judge. Retired Wildlife Biologist. Supervisor of a nature preserve up until I retired.
Image
May 8, 2020 10:25 AM CST
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
Its a fungal infection that acts like damping off. The purple leaves and stems and the fungal infection usually occur when plants are kept too cold. I'm not sure they will survive.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

President: Orchid Society of Northern Nevada
Webmaster: osnnv.org
Avatar for knarge
May 9, 2020 10:17 AM CST
Philadelphia, Pennsylvania
Thanks BigBill and Daisyl...

would it make sense to spray them with a very mild, gentle baking soda spray? The foliage looks really good the last couple of days, other than this stem issue.

As for the temperature, I do have a heating mat and have monitored their temperature/am pretty confident they've been sufficiently warm, so I am not sure what is responsible for the purple coloring.

Hopeful at least a couple will survive (I have 6 total).
Image
May 9, 2020 10:27 AM CST
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
Baking soda is salt. You are trying to keep them alive.

I would do what BigBill said and plant them with the stem buried - maybe they will grow more roots before the rest of the stem dies.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

President: Orchid Society of Northern Nevada
Webmaster: osnnv.org
Image
May 9, 2020 10:46 AM CST
Name: Big Bill
Livonia Michigan (Zone 6a)
GROW ORCHIDS!!!
Bee Lover Lover of wildlife (Raccoon badge) Orchids Region: Michigan Hostas Growing under artificial light
Echinacea Critters Allowed Cat Lover Butterflies Birds Region: United States of America
Daisy made a good point in that I vaguely remember hearing or reading something about tomato's turning purplish in colder temperatures. Heck, when you turn 70 your brain is full and in order to cram more knowledge in there, something has to 'leak out'!
Orchid lecturer, teacher and judge. Retired Wildlife Biologist. Supervisor of a nature preserve up until I retired.
Image
May 9, 2020 2:17 PM CST
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
Its a Phosphorus deficiency. Not a lack of phosphorus but, inaccessible to the plants because of low temperatures. Warm temperatures fix it right up.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

President: Orchid Society of Northern Nevada
Webmaster: osnnv.org
Only the members of the Members group may reply to this thread.
  • Started by: knarge
  • Replies: 6, views: 805
Member Login:

( No account? Join now! )

Today's site banner is by Murky and is called "Purple & Bloom Salvia"

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.